Stripped Down and Rebuilt (смешанная)

Severus Snape doesn't think Albus' plan to martyr Potter will work out and knows nothing of the secret setup to give Harry a chance to live through the killing curse a second time. He decides that what they really needed was to start hunting the Horcruxes years ago instead of waiting for children to do it for them. He sends back his private notes and everything needed to brew a potion to strip off the spells that are restricting his behavior. He expects that his younger self will receive the information in 1992 at best.
On the Summer Solstice, 1985, a listless Severus Snape is surprised by a generous and lucrative gift from his future self.
Featuring: Reluctant schemer turned proud parent. A secret adoption. Narcissa Malfoy and most of the Hogwarts staff trying to get Snape married. Lord Prince decides that a half-blood grandson is better than no grandson, provided he's invented something impressive enough to make up for it. Snape moonlighting as an undercover pedo-catcher to keep his spy skills sharp. The Hogwarts Staff Room betting pool.